This 10k white gold oval blue topaz and diamond ring features a 7x5 mm genuine natural blue topaz with a 0.66 ct total weight.December Birthdays: Blue Topaz is the birthstone for December birthdays, with an icy yet exhilarating blue color that pops in a season dominated by reds and greens.Meaningful Beauty: The right piece of jewelry will allow you to create elegant, sophisticated looks for formal events, or add a luxurious element to your day to day or business wear. But you can also use fine jewelry to add some symbolic meaning to a look or gift choice, choosing gem that aligns with a birthstone, Zodiac sign or even the day of the week a person was born! Alternately, choose a flattering or favorite color gemstone. General Care: Preserve your fine jewelry and keep it looking its best with proper storage and cleaning. Store jewelry in a clean, dry place and inspect your jewelry at least once a year for loose prongs, worn mountings and general wear and tear. Avoid using harmful chemicals, makeup and hair products as these can damage your jewelry. A professional cleaning is advised one per year to help maintain these cherished items.